1015212155 has 16 divisors (see below), whose sum is σ = 1248825600. Its totient is φ = 791857248.

The previous prime is 1015212139. The next prime is 1015212169. The reversal of 1015212155 is 5512125101.

It is a cyclic number.

It is not a de Polignac number, because 1015212155 - 2⁴ = 1015212139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1015212155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124844 + ... + 132726.

It is an arithmetic number, because the mean of its divisors is an integer number (78051600).

Almost surely, 2^1015212155 is an apocalyptic number.

1015212155 is a deficient number, since it is larger than the sum of its proper divisors (233613445).

1015212155 is an equidigital number, since it uses as much as digits as its factorization.

1015212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 1015212155 is about 31862.3940563166. The cubic root of 1015212155 is about 1005.0452212682.

Adding to 1015212155 its reverse (5512125101), we get a palindrome (6527337256).

The spelling of 1015212155 in words is "one billion, fifteen million, two hundred twelve thousand, one hundred fifty-five".